We used to be overrun with ravens and there was great competition for nest sites. My wildlife pal pointed out one which was just by the roadside on a small cliff face which was unusual. They were not popular with farmers as they were a danger to newborn lambs and the ewes as well. Since the upsurge of sea eagles there are not so many now and they tend to shun humanity.
There are adders on Mull but none on Iona since St Columba banished them.
A dead fox was found by the roadside once but my pal reckoned somebody had killed it on the mainland and left it there to wind him up as he was head Ranger.